Dammit! new 02's and STILL running rich!

[SHODOG220]

Well, after getting 2 codes from the KOEO test, both indicating system lean, I decided to get some new 02 sensors for the car. Seemed logical. I had already cleaned out my IAB valve in hopes that it would help my stuttering problem. No luck there. So I replace the 02's and, voila! Stuttering stops....for about 2 weeks. Now its back and so I decided to check the codes again. SAME 2 CODES came up!! 173 and 177 both which indicate system rich!! WTF is up with my SHO!?!? Also, this time I got a code 211 which is a PIP Circuit fault. What is a PIP circuit? Help!!!

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92 black/black MTX, 48k miles, SHO SHOP Y-pipe, silencer box removed.
91 White/Black MTX: Dynomax catback/Summit Turbos, K&N Filter, Boxless, Kuhmo ECSTA 225/55VR16 tires, Centerforce Dual Friction Clutch/Grizzly TOB, SHO NUT Motor mounts. SHOCAGO Member

http://www.picturetrail.com/shodogg

 

[CTOESHO]

HAHA, sounds like I'm in the same boat as you. My new Ford Motorcraft O2's that were replaced a couple of months ago along with my Performance Plus Y-Pipe is throwing me a code saying I'm running too rich. Don't know what to do.

Mike
93mtx

 

[sdpatt]

The 211 code is defined as "Ignition PIP signal was erratic or missing." The PIP (profile ignition pickup) is the crankshaft position sensor (CPS).

If your engine is stuttering (misfiring?), your O2 sensors probably are detecting an actual rich condition. There is unburned fuel in the exhaust that is causing the O2 sensors to indicate a rich mixture. The fact that it is on both banks is the tip-off to the CPS.

If only one sensor is showing rich, then it would be a bank-specific cause such as a plug wire or plug causing the misfire. If both banks are indicating rich, then there is a common cause and most likely in the sensors or processors. The erratic or missing signal from the CPS could cause this this apparent random cylinder misfire.


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Scott

1991, 255K miles, glass hood, police grill, SVO shifter, Catz fogs,
K&N, 73mm MAF, Superchip, PP Y-pipe, Borla cat-back, 190 lph pump
Eibach/Tokico/poly, Alum front SFB, SS front/rear strut braces,
16x7.5" Moda R1, 225/55ZR16 Bridgestone RE730, -1 deg camber x 4,
6 disc CD, Class II hitch, Silver award at SHOklahoma Car Show

 

[SHODOG220]

*breathing hard* AAAAHHH!!! CPS?!?! OH NOOO!!!! So you mean...I should replace the CPS then?? Isnt that, um, a bit, um, $$$PRICEY$$$ ?

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92 black/black MTX, 48k miles, SHO SHOP Y-pipe, silencer box removed.
91 White/Black MTX: Dynomax catback/Summit Turbos, K&N Filter, Boxless, Kuhmo ECSTA 225/55VR16 tires, Centerforce Dual Friction Clutch/Grizzly TOB, SHO NUT Motor mounts. SHOCAGO Member

http://www.picturetrail.com/shodogg

 

[waddsn1060]

From what I heard Luke, it can be VERY pricey.......sucker lol

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9 DAYS TIL CUBS TICKETS GO ON SALE!!!!
91 BLACK MTX
Some mods, nothing worth mentioning.
0-60=6.28sec
1/[email protected]

Brad's Memorable Quote from Fear and Loathing in Las Vegas
Raul Duke-"Few people understand the psychology of dealing with a Highway Traffic cop. The normal speeder will panic and pull over to the side...this is wrong. It arouses contempt in the cops heart. Make the bastard chase you, he will follow."

 

[SHOTIME]

Unless you do it yourself and save about a grand..


Will you people BUY SOME DAMN TOOLS

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Eric
mailto:[email protected][email protected]</A>
My Web Space
New England SHO Specialists

 

[sdpatt]

Originally posted by SHODOG220:
*breathing hard* AAAAHHH!!! CPS?!?! OH NOOO!!!! So you mean...I should replace the CPS then?? Isnt that, um, a bit, um, $$$PRICEY$$$ ?

The part is not: Wells SU242, AutoZone.com $42.99. For the MTX, you only have to remove the upper and lower (after the damper) timing belt covers. Remember to gap it at .03" from the sensor vane.

Scott

 

[fredhurderjr]

Actually, the PIP sensor error is the cam position sensor OR the crank sensor, I believe.

I say this because we've had PIP faults that were covered by changing the cam position sensor (and if you look at aftermarket sensor descriptions, they usually say "PIP Sensor" rather than cam position sensor).

Just a 2nd opinion...

 

[SilverSHO]

FWIW, PIP stands for Profile Ignition Pickup. I got the same code last time I checked my car (I also got a SPOUT circuit open code, but that's another story). I changed my leaky water pump right after I got my car, but didn't replace the CPS, so I'm guessing it's time to replace the thing.

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Nick
Lt. Titanium 90 137k
Coneless, ACCEL 8.8 stainless steel wires,
SHO Shop solid roll dampers, Cherry Bomb Turbo II mufflers, snazzy blue valve stem caps
AIM: loudog6491